Type-writing machine.



PATENTED APR; 30. 1907.

C. W. WALKER. TYPE WRITING MACHINE. APPLIOATION FILED 001.23. 1902.

2 SHEETS-SHEET 1.

INVENTEIH= am WTNEEEES? No, 851,847.- PATENTED APR. so, 1907. 0. w. WALKER. TYPE WRITING MACHINE.

APPLICATION FILED OCT. 23, 1902.

2 SHEETS-SHEET 2.

INVENTEIFQ:

1-415 AlTElHNE-ZY UNITED STATES;

PATENT OFFICE.

(31 1A RLES W. WALKER, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO YOST WRITING MACHINECOMPANY, OF ILION, NEW YORK, A CORPORATION OF NEW YORK.'

rvps wmrme. MACHINE.

Patented April 30, 1967.

Application filed October 23, 1902. Serial No. 128,470.

[ all whom it may concern:

Be it known that 1, CHARLES W. WALKER, a citizen of the United States, and a resident of Bridgeport ,in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Type -W'riting Machines, of which the followingis aspecification.

My present invention relates to carriage feed or escapement mechanism for typewriting machines and the object of said invention is to provide simple,-rapid and efficient mechanism of the character described.

To the above and other ends which will hereinafter appear my invention consists of the novel features of construction, arrangements of parts and combinations of devices to be hereinafter described and particularly pointed out in the appended claims.

" In the accompanying drawings, wherein like reference numerals represent corresponding parts in the various views, Figure 1 is a vertical, front to rear, sectional view of one form of typewriting machine embodying my invention. Fig. 2 is an enlarged, .detail, end view of the tension adjusting device for the dog rocker. Fig. 3 is an enlarged detail transverse, horizontal, sectional view of the same. Fig. 4 is an enlarged, detail, rear elevation of the feed dogs and a portion of the dog rocker. Fig. 5 is a fragmentary','side view, partly in section, of a portion of a type action and the escapement'mechanism controlled thereby. Fig. 6 is an enlarged, de-

tail, vertical, sectional view of a portion of the escapement'mechanism. Fig. 7 is an enlarged, detail, bottom view of the escapement wheel and certain of the associated arts. Fig. 8 is a plan view of the same.

ig. 9 is a transverse, sectional view of a porrocker, the section being tion of the .dog

takenon the line m-ac of Fig. '4, Fig. 10 is i an enlarged, detail, fragmentary, perspective view of the dog rocker. I

The invention is shown applied to a typewriting machine of the character illustrated in my application filed December '21, 1901,

Serial No. 86,821, and in the application of Arthur W. Smith filed December 11, 1901,

Serial No. 85,451, and certain of the fea-' tures shown herein are claimed in said applications. It should be understood, however, that the carriage feed or escapement mechanism of my present invention may be applied to various characters of writing machines.

. oppositely The frame '1 of the machine supports oppositely' grooved tracks 2 that receive antifriction balls 3 which are likewise received in grooved tracks 4 of the carriage 5, the latter. being provided with a traction roller 6 that bears upon .a track 7 and' a Iplaten 8 is carried by and adapted to rotate in hearings in the carriage. Projecting rearwardly from the carriage 5, and extending throughout the length thereof, is a feed rack 9 which meshes with the pinion 10 operatively connected to the escapement mechanism, as will hereinafter more clearlyappear. Each of the finger keys 11 has a key stem 12 that is pivoted at 13 to a link 14 pivoted on a cross rod 15 that extends from side to side ofthe machine.

i The lower end of each key stem is pivoted at 16 to a curved crank arm 1-7 secured to a lever 18 pivoted at 19 on a fixed bar that extends from side to side of the machine. The lower end of each lever 18 is-connected at 20 toa draw link 21 that in tum is pivoted at its opposite end 22 to one'arm of a bell crank lever 23, the other. arm of said lever being ivoted at 24 to an upright draw link 25. Jach bell crank lever 23 is pivoted at 26 to a hanger 2 7,;the various hangers 27 .being arranged in twooppositel'y disposed segmental series. The upper end of each-upwardl -ex-- tending link is connected at' 28 to .a river or-lever29 pivoted on a curved, pivot rod 30 supported by a type ring. 31. The lower end of each'driver is connected by a pivot 32 to one member. 3 3-of a jointed type bar, the two members 33 and 34 of each bar being ivota'lly united at 35. The section 34 0 each jointed type bar has a bearing-disk 36 at one end thereof which is received within a channel bearing formed b two oppositely 'dis-' posed plates 37 with peripheral channel grooves nearthe edges thereof for the reception of the bearing portions 36 of the various typebars, the plates themselves being supported by an upward extension 38 projecting from the frame 1 of the machine, The types 39 on the "various type bars'normally rest against an inking pad 40, as illustrated in Fig. 1, and adepression of a'key is effective J to move the associated type to the printing point as shown in Fig; 5 anda spring 41 is providedfor each action, one "end'" of said spring being connected to the associated link 25 and the opposite end thereof to the driver 29 so that when the pressure on the finger key is released, the spring 41 is effective to restore, the parts to the normal positions. Situated above the plates 37 is a universal plate 42 that has a depending'peripheral flange 42 and which is so arranged that the plate will be tilted or one side thereof .ele-

vated, by the contact of a member 34 of the and through a central opening in the upward extension 38 of the frame 1. The lower end of this rod 43 passes through an opening in a block 45 and an adjustable nut 46 is received onthe threa'ded end of the rod below said block. The block 45 is connected by a knuckle 'oint to an arm 48 that projects for- War ly from the dog rocker,'the pivot of the joint being indicated at 47, and, the construction is such that the arm 48, together with the dog rocker, isadapted to receive a movement independently of that transmitted thereto by the universal plate, as will hereinafter more clearly appear. '.The dog rocker or carrier comprises the forwardly extending arm 48, hereinbefore referred to, a downwardly extending arm 49 and a rearwardly extending arm 50. The downwardly ex- 3 5 tending arm carries in a slot therein, a link 51- ivoted at 52 and adapted to. abut against a aterally extending pin 53 carried by the arm 49 and projecting across the slot therein, so

as to cause the dog rocker to be moved with the link when the latter is moved toward the front of the machine,.but which permits a movement of the dog rocker independently.

of the link. "The lower end of the link 51 is pivoted at 54 to a forwardly extending draw 5 ink 55, the front end of which is pivoted at 56 to one arm of a bell. crank lever 57, the

other arm of said lever being pivoted at 58 to r a key stem 59 provided with a spacing bar or key 60 having depending ears to which are 50 pivoted the forward ends oflinks 61 that are united by a cross bar 61 and the rear ends of which are pivoted at 62 on a crossbar that 'extends from side to side of the machine.

Bythese means motion may be transmitted 5 5 to. the-dog rocker from the spacing bar without affecting the universal plate.

The dog rocker has a shaft 63 rigidly connected thereto by a set screw 64-, said rock shaft being seated in side bearings 65 that 60 constitute portions of bracket plates 66 se cured-to theframe of themachine. Upon reference \to" Fig. 3, it will be seen that the hub 67 of the dog rocker has a housing 69 secured thereto b screws 68 and that this 6 5 housing is provi ed with bearings 70 (Fig. 2)

' ceived in an opening in the depending arm 49 sense? for a worm 71, one end of which extends throu h a bearing 70 in the housing and is provided with a notched head 72 by means of which the worm can be turned by a screwdriver or like tool. Contained within the 70 housing 69 and loosely mounted on the shaft 63, is a worm wheel 73 that is engaged by the worm and maybe turned thereby. A coiled spring 74 surrounds the shaft 63 and one end of said spring is connected at 75 to the worm 75 wheel 73, whereas the opposite end of the spring bears against a' pin 76 that projects from one side of a bracket plate 66 (Fig. 10). Thus the coiled spring 74 constitutes a restoring spring for the do rocker and the worm 71 aflords means for. adjusting the worm wheel 73 in order to vary the tension of the spring of thedog rocker.

The rearwardly projecting arm 50 of the dog rocker has an .upwardly and rearwardly extending arm 77 that'supports a bearing 78 through which a vertically disposed so-called This fixed dog isadjustably secured in place by a set screw 80 that passes through a threaded opening in the side of-the bearing 78, and the'lnner end of said screw bearing against the fixed dog 79 secures it in the adjusted position. Depending from the arm 50 is abearin 81 that is apertured foreand aft of the mac ine for the 5 reception of one arm 82 of a loose L shaped feed dog 83, the other arm 84 constituting the feed dog proper. The forward end of the pivotal arm of the loose dog is likewise reof the do rocker and which constitutes an additional bearing therefor. A sleeve 85 is.

secured by a set screw 86 to the pivot arm of the loose dog forward of the bearin 81 so as to maintain the dog against displacement from its bearings. A coiled spring 87 surrounds the pivot arm of the loose dog and is connected at one end to the depending arm 49 of the dog rocker, whereas the other end of said spring is connected to the collar or sleeve 85. The set screw 86 affords means for securing an adjustment of the collar around the pivot arm of the loose dog so that the tension of the spring 87 thereon may be varied at will. The rearwardly directed arm 50 of the dog rocker has a barrel-like portion 88 formed thereon and this barrel-like hearing portion is slotted transversely at 89 for the reception of'a plate 90 which isadapted to be adjusted along said slot.

Oppositely disposed adjusting screws 91 are received in tapped openings in the ends of the barrel-like portion 88 and the inner coined ends of said screws bear against diagonal shoulders 92 on-the plate, thus preventing 12 5 the plate from being withdrawn from the slot and at the same time providing means whereby the plate may be shifted or adjusted in the's lot and transversely of the rocker. The rearwardly extending portion of the 1 0' ioo' ' wheel is placed in tate with its carrier.

' 6'10 1-of the carrier may 3 Fig. .6, bears on describe .re'ception of I similarly spasm plate 90,is bifurcated at 93 for the reception of the upright arm 84 of the loose feed dog,

the arms 94formed by the bifurcation, conpositely disposed and are situated upon opplosite sides and transverse to, the plane of a orijzontally disposed esca ement wheel 95' which is preferably in the 'f rm of a disk with. a circular series of'round esca ement openings 96 extending therethroug and located withinthe periphery of the disk. These inclosed openings, a erturesor holes are equidistant arid are such an extent that narrow websn97 are formed. between them."

While the fee'dorescapement' wheel 95 is preferabl' formed as a disk. in the manner it should be understood that it may be formed integral 'with its carrier 98. Whenthe escapeme t wheel. is formed in the nature of a disk; I ai'efer to provide a series of locking aperture or slots 99 therein for the located studs 100 on the' carrier' soithat when the escapement' osition on the carrier with the studs 100 projecting in the apertures 99, the escapeme'nt'wheel will be located to re- The cylindrical portion be threaded on its outer surface for the reception of a nut 1'02, which whensciewed in place as illustrated in the 'escapement wheel. and

, maintains it against displacement from its carrier. By this construction, means are provided by which an escapement wheel of one'character or spacing may be, readily replaced by another 'escapement wheel ofa different character or spacing- The carrier 98 has a depending hollow stem 1'03 that extends through a sleeve 104 contained within an opening in the frame 1 of the'machine. The lower end of the hollow stem 103 receives a'collar- 105 'that'is se-' cured in place by a set screw 106 which is received in a-threaded opening in thecolla'r and bears at its inner end a ainst the hollow stem to maintain the collar in place and thus .pre-' vent the carrier frombeing displaced from its hearing. The upper portion of the carrier has a channel or groove 107- therein for the race tion of anti-frictionballs 108 "and these be ls likewise co-operate with a bearing formed at the upperedge of the sleeve 104 so that a ball bearing support is provided for the carrier-and the escapement wheel secure thereto. A' split ring or washer 109 may be seated in and secured to the carrier beneath thechanriel 107 for the ballsby the s )ring pressure thereof so as to retain the ba ls in the carrier 98 when the parts are being assembled and to prevent dust or grit from entering the bearings. The upper end of the support 98 is provided with a series of crown raise the arm ratchet teeth 110, which co-operate with suitable clutch mechanism contained within the housing 111 and the purpose of which is tooperatively connect the escapement wheel to the shaft or sleeve 112 that rotates with the pinion 10, so that when the escapement mechanism isvactuated, the carriage under a the tension of the'usual carriage spring (not shown) will be moved a letter space distance at a time in the direction of its feed and whereby the carriage may be returned or moved from left to right without transmitting motion" to the escapement wheel. The clutch mechanism contained within the housing 111 and which is also shown in British Patent No. 25,382 of 1901 to the Yost Writing Machine 'Company.

From an examination of Fig. 4, it will be observed that in the normal positions of the parts the feed dogs are directed toward each other and toward the interposed escapement wheel and that said dogs are in substantial alinement and are presented end to end. When a finger key-is depressed, motion will be transmitted to the jointed type bar and the member 34 thereof will, in the movement of the type to the rinting point, contact with the universal ate, thereby tilting it, which results in the ar 43 being elevated to 48 of the dog rocker as indicated in Fi 5. The effect of this movement is to turn t e dog rocker with itsshaft 63 so as to move the loose dog out of engagement with the escapement wheel and to simultaneously carry the fixed dog into the same openingthat contained the loose dog, as repre-' sented in Fig. 5. The loose dog having been moved clear of the escapementwheel in the manner stated, will be moved on the dog rocker. around its pivotalcenter b" the spring 87 so that theend of the loose 0g 64 will swing to .a position opposite the next opening a in the escapement wheel, as represented diagrammatically and in dotted lines in Fig. 8. When the pressure on the finger key is released, the dogrocker will be restored to, its normal position by the spring 74 and the loose dog will be projected into the opening a, and will first be brought into contactwit 1 that portion of the'wallof said opening which is nearest the periphery of the escapeinent wheel and which is indicated at rocker iseifective to withdraw the fixed dog from the opening 0 into which it was projects ed and the pressure exerted by the carriage sprin will tend to rotate the escapement whee through the feed rack 9 and the intermediate connections between the rack and escape'ment wheel, thus pressing the loosedog back to the normal position or into alinement with the fixed dog and to the osition represented in full lines in Fig. 8, an also in Fig. 4, where it is arrested by one ofthe stops,

The same rocking movement of the dog is essentially the same as that shown and de- I I scribed in my application above referredto' ICC , thereby affording a letter feed movement of the carriage. Upon reference to Fig. 8, -it will be understood that the loose dog swings in a plane transverse to the plane of the escapement wheel and which is represented by the line (1 in Fig.8. It .will likewise be seen that in the movement of the loose dog to the advanced position as from the opening to the opening a in the escapement wheel it first contacts at b with the curved side wall of the I aperture, a and as the loose dog moves with gages the wall of an opening in the escapethe escapement wheel after being engaged thereby, said dog is gradually moved from the position indicated in dotted lines in Fig.

- 8 to that indicated in full lines, and assumes adifi'erent relative position in the aperture or opening. Thus when the loose dog first enment wheel, it is nearest the periphery thereof and is gradually moved toward the center of rotation of the wheel as the wheel and dog move to the position where thedog and escapement wheel are arrested against'f-urther rotation by oneof the stops 94 By this construction I am enabled to provide a simple, rapid and efficient escap'ement or carriage feed mechanism wherein the escapement wheelcan be made very thin' and light Without decreasing the strength or rigidity of the wheel and at the same time increasing the e'liiciency thereof.' Thus by providing a series of openings in the escapement wheel, as

shown, which are contained Within the periphery thereof, I am enabled to make'tlie Wheel of a comparatively thin disk with but little space between the openings at those portions 97 of the intervening webs where the 'let off" takes place. thereby providinga quick action of the escapement without decreasing the strengthv of the escapement wheel. This latter result is due to the fact that the webs between the openings not only receive support from the central portion of the wheel but the peripheral portion thereof extends around the openings and constitutes an integral portion 0 the webs and lends additional support thereto and they are only made thin'between the openings at the portionsQ? where it is essential that they should be made thin in order to secure a rapid operation of the esrocker is vibrated on its horizontally dis posed pivotal axis; that the ivotal axis of the loose dog issubstantially orizontal and is directed fore and aft of the machine and at right angles to the pivotal axes to the dog rocker and escapement wheel and arallel to the plane of the escapement whee and that the said pivotal axis of the loose dog is radially directed with; relation to the escapement wheel or that the dog may swing in a plane (1 which is at substantially right angles to a plane radiatin from the center of said wheel and that the pivotal axis of the dog rocker is at right angles to the vertically disposed pivotal axis of the escapement Wheel.

The action of the escapement'mechanism may be nicely determined and regulated by the set screws 80 and 9 1, the former providing-a vertical adjustment of the fixed .do ,whereas the latter provides an adjustment 0 the stops for the loose dog, to limit the independent movement thereof in opposite directions.

What I claim as new and desire to secure by Letters Patent, is

1. In escapement mechanism for typewriting machines, the combination of an escapement wheel having a series of escapement holes located inside of the periphery thereof, and an escapement device co-operf ating therewith.

2. In carriage feed mechanism for writing machines, the combination of an escapement wheel having a series of circularly arranged escapement apertures extendin therethrough, each aperture having a wal that entirely surrounds it, and an escapement device that co-operates with said Wheel.

3. In a typewriting machine, the combination of a carriage, an escapement wheel operatively connected thereto, said escapement wheel having a series ofinclosed escapement openings therein that are spaced at equal distances apart, and feed dogs which co operate' with said escapement wheel at the escape- Inent op enings therein. a

4. In a typewriting machine, the combina: tion of a carriage, an escapement disk operatively connected thereto, said escapement disk having a circular series of escapement apertures located inside of the p'eripher thereof, and feed dogs which co operate wit typei saidlescapement disk at the eseapement openings therein.

5. In carriage eseapement mechanism for typewriting machines, the combination of an'escapement wheel having a series of round esca ement openings therein, and feed dogs Whic co-operate with said eseapement wheel at said eseapement openings.

6. In a typeirriting machine, the combina- 10 tion of a carriage, an eseapement disk operatively connected thereto, said disk having a circular series of round )enings located within the periphery thereof, and feed dogs which co-operate with said eseapement disk I and are adapted to extend into the openings 1 therein. j

7. In a typewriting machine, the combination of a carriage, a removable eseapement disk operativelyconnected thereto, said disk having a circular series of round openings located within the periphery thereof, and feed dogs which co-operate with said escapement' disk and are adapted to extend from oppositedirections into the openings therein,

8.- In carriage feedmechanism for typewriting machines, the combination of a feed wheel having a series of openings therein located within .the periphery of said feed wheel and feed dogs that extend from opposite directions transverse of the plane of the feed wheel and which are adapted to be alternatelg projected into the openings therein.

9. n a typewriting machine, the combination of a. carriage, an eseapement wheel operatively connected thereto and having acireular series of openings that are located within the periphery of 'said wheel, a loose feed dog that is located to one side of the plane of said wheel, a fixed dog that is located on the other side thereof, and means for moving said dogs alternatelyinto and out of, the openings 1n the eseapement wheel.

.10. In a typewriting machine, the combi: nation of a detachable eseapement wheel having a-circular series of feeding openings located within the eriphery of said Wheel, a

00-0 crating fixed og or detent, a co-operating' oose or stepping do adjustable means for limiting the throw 0 the loose dog, and means for affording the substitution of one eseapement wheel for another, whereby an escapement wheel with one character of spacing may be replaced by an eseapement wheel with a different character of spacing.

55. ,11. In carriage eseapement mechanism for typewriting machines, the combination of an eseapement wheel havin a series of openings located within the perip cry of said wheel and co-operating feed or eseapement dogs,

the ends of which are directed toward each other. and toward the interposed eseapement wheel, means for vibrating said dogs inrthe directions in which they are directed, and

. a means for affording an independent vibration of one of said dogs. T

12. In a carriage eseapement mechanism for typewriting machines, the combination of an eseapement wheel having a circular series of eseapement openings within the periphery thereof, a dog rocker, a fast dog or detent and a loose stepping dog carried thereby, the said dogs projecting toward each other and adapt ed to pass into the eseapement opening from opposite sides of the wheel, the loose stepping dog being mounted to swing independently of its rocker in a plane that is at substantially right angles to the plane of the eseapement wheel, the loose dog being moved to normal position in the last mentioned direction by the eseapement wheel.

13. In a carriage eseapement mechanism for typewriting machines, the combination of an eseapement wheel having a series'of open- .ings therein, which eseapement openings are located within the periphery of said wheel, a dog rocker, a fast dog and a loose dog carried thereby, the loose dog being mounted to swing independentl of its rocker in a plane that is substantia ly at right angles to the planeof the escapement wheel, the loose dog being moved to normal position in the last mentioned directionby the eseapement wheel.

14. In a carriage eseapement mechanism for typewriting machines, the combination of an eseapement wheel having a circular series of eseapement o enings located within the' periphery thereo a dog rocker, a fast do and a loose dog carried by said rocker an projecting toward each other and toward the interposed eseapement wheel, the said loose dog being mounted to swing independently of Its rocker in a plane that is substantially at right angles to the plane of the escapem'ent wh ael, the loose.dog being moved to normal position in the last mentioned direction by the eseapement wheel.

15. In a typewriting machine, the combination of a carriage, a, horizontally disposed eseapement wheel operatively connected thereto, a dog rocker which has a horizontal pivot and verticall disposed feed dogs that are carried by said 0g rocker and co-operate with the eseapement wheel, and which are located on opposite sides of the horizontal plane in which the eseapement wheel is situated, one of said dogs being a loose step ing dog that moves on a horizontal pivot w ich extends at right angles to the pivot of the dog rocker and is parallel to the plane of the eseapement wheel. 7

16. In a typewriting machine, the combination of an eseapement wheel, a co-operating fixed dog, a co-operating substantially" L- shaped loose steppmg dog, one arm of which constitutes a pivot for the dog, whereas the other arm constitutes the do proper, said dogs being oppositely disposed and projectmg endwise toward the interposed escapement wheel.

nation of an escapement wheel, a dog carrier, a fixed dog adjustablysecured to said dog carrier, and an oppositely disposed loose nation of a carriage, a horizontally disposed escapement wheel with escapement openings within the periphery thereof, a dog rocker, and oppositely disposed vertically arranged feed dogs carried by said rocker,.and one of which is a pivoted loose dog with the'pivot thereof extending fore and aft of the machine. I 3

19. In a typewriting machine, the combination ofa carriage, a horizontally disposed escapement wheel having a circular series of openings arranged within the periphery of the wheel, a dog rocker and opposite y disposed vertically arranged feed dogs carried by said rocker and extending on opposite sides of the escapement wheel, and one of which is a pivoted loose dog with the pivot thereof extending fore and aft of the machine. I

20. In a typewriting machine, the combination of an escapement wheel, a carrier therefor and to which said wheel is firmly attached and removably secured, roller bearings for said carrier, and feed dogs which cooperate with said escapement wheel.

21. In a typewriting machine, the combination of an escapement wheel having a circular series of openings located within the periphery of said wheel, a carrier to which said escapement wheel is removablyv secured, and

oppositely disposed feed dogs which 'co-operate with the escapement wheel,

22. In a typewriting. machine, the combination of an escapement wheel having a cir-' cular series of round openings located within the periphery of said wheel, a carrier to which said escapement wheel is removably secured, roller bearings for said carrier, and

oppositely disposed feed dogs which project toward each other and toward the interposed escapement wheel.

23. Ina typewriting machine,. the combi nation of an escapement wheel having a circular series of openings therein, and co-operating feed dogs, one of which is a loose dog that is vibrated into and out of said openings and first contacts with a wall of an opening nearest the periphery of the wheela'nd gradually moves along said wall towardthe' cen.

ter of the wheel, as the wheel is brought to rest by said loose dog. I

24. In a typewriting machine, the-combination of a carriage, an escapement wheel operatively connected thereto and having a circular series of round openings therein, and co-operating feed dogs located upon opposite sides of said wheel and projecting toward each other and toward the interposed escapement wheel, the end of one dog extending toward the end of the other when the parts are in the normal positions and one being a loose dog that is adapted to vibrate transversely of the plane of the escapement wheel in the movement of the dog from one opening to ward the next opening in the wheel.

25. In a typewriting machine, the combination of a carriage, an escapement wheel, operat1vely connected thereto and having av end of one dog extending toward the end of the other when theparts are in the normal positions, and one being a loose dog that is adapted to vibrate-in a direction transverse to the plane of the escapement wheel in the movement of the dog from one opening toward the next opening in the wheel, and means for vibrating said dog carrier so as to move the dogs in the general direction in which they extend when in the normal positions. I

' 26. In a typewriting machine, the combinationof a carriage, a horizontallydisposed escapement wheel operatively connected thereto and having acircular series of round openings therein, a horizontally pivoted do carrier, vertically disposed feed dogs carrie by said. carrier and located upon opposite sides of saidfwheel and projecting toward each other and toward the interposed escapezontally pivoted loose dog that is adapted to vibrate in 'a direction transverse to the plane of the escapement wheel in the-movement of the dog from one o ening-toward the nextopenin in the whee and means for vibrating sai dog carrier on its horizontal pivot so as to move the dogs in a general vertical direction and in the direct1on in which they extend when in the normal position.

, 27. In a typewriting machine, the combi nation of. a carriage, an escapement wheel operatively connected thereto and having a circular series of openings therein, a dog'carrier, a fixeddog adjustablv secured to said .carrier, a loose substantially L-shaped dog, one arm of which constitutes a pivot that the dog swin s on, whereas the other arm constitutes t e dog proper, said dogs being on opposite sides of the escapement wheel and directed toward each other and toward the interposed escapement Wheel, and means for vibrating said carrier so as to move the dogs at substantially right angles to the plane of the escapement wheel.

28. In a typewriting machine, the combination of a carriage, an escapement wheel operatively connected thereto and having a circular series of openings therein, a dog carvibrating said which constitutes a pivot that the dog swings on whereas the other arm constitutes the dog proper, a spring that surrounds the pivot arm of said loose dog and tends to maintain it out of alinement with the fixed dog and to swing it in a direction transverse opposite sides of the escapement wheel and directed toward each other and toward the interposed escapement wheel, and means for carrier so as to move the dogs at substantially right angles to the plane of the escapement wheel.

29. In a carriage escapement mechanism for typewriting machines, the combination of a dog rocker, a fixed dog carried thereby, an L-shaped loose stepping dog, one arm of which constitutes a pivot on which said dog swings Whereas the other arm constitutes the loose dog proper, a spring connected to said pivot arm of the loose dog and to dog rocker,

means ior adjusting the tension of said spring, and a co-operating escapement wheel.

30. The combination with a dog rocker, of a housing secured thereto, a worm mounted in hearings in said housing, a co-operating worm wheel contained within said housing, and a coiled spring which is connected at one end to the Worm wheel and at the opposite end to a fixed portion of the machine.

31. The combination with. a dog rocker and rock shaft therefor, of a housin secured to said dog rocker, a Worm mounted in bearings in said housing, a co-operating worm wheel contained within said housing and loosely mounted on the shaft of the dog rocker, and a coiled spring which surrounds said shaft and is connected at one end to the to the plane of the escapement wheel, said dogs being on'-' worm wheel and at the opposite end to afixedportion of the machine.

32. In escapement mechanism for tlpewriting machines, the combination of a 0g rocker, a bifurcated plate carried by said dog rocker, means for adjusting said plate relatively to the dog rocker, and a loose dog carthe bifurcation in said plate.

33. In escapement mechanism for typewriting machines, the combination of a dog rocker, a bifurcated plate seated in a groove in said dog rocker, adjusting screws that cooperate with said plate to maintain it in said groove and to afford an adjustment of said plate relatively to the dog rocker, and a loose dog carried by the dog rocker and extending into the bifurcation in said plate and limited in its vibration by the plate.

34. In escapement mechanism for ty e- -writing machines, the combination of a dbg rocker, a bifurcated plate that is seated in a groove in said rocker, adjusting screws that project in opposite directions and bear against said plate to maintain it in its groove and to afford an adjustment thereof along its groove and relatively to, the dog rocker, and an L-shaped loose dog that has onearm which extends into the bifurcationin said plate and which is limited in its movement thereby.

' Signed at the borough of Manhattan, city of New York, in the county of New York I and State of New York this 21st, day of Octoher A. D. 1902. i

CHARLES W. WALKER.

WVitnesses: K. V. DONOVAN, E. M. WELLS.

ried by the dog rocker and extending into 

